Chemical mixer



FIG. 1 is a top, front and right side perspective view of a chemical mixer showing my new design;

FIG. 2 is a top plan view, wherein the lids have been omitted for convenience of illustration;

FIG. 3 is a front elevational view;

FIG. 4 is a right side elevational view, the left side being a mirror image thereof;

FIG. 5 is a rear elevational view;

FIG. 6 is a top, front and right side perspective view thereof; and

FIG. 7 is a top, front and right side perspective view showing an alternative embodiment wherein the front has windows. 

The ornamental design for a chemical mixer, as shown and described. 